Whats up usybear. I grow in a closet 5x2x8 and it works well. Have an air cooled 400 and a carbon air filter. Struggle with temps a bit especially cuss of my bunkk A/C. Nonetheless can run it without any probs with the door closed. In a small apt those lights are bright as shit. Good luck and keep us posted. Oh yeah and I had to cut a few holes hear and there for flex duct but just gonna patch em up when i'm done. Hang my exhaust fans with bungee cords and it cuts down on vibration. Have my ballast outside of clos, less heat in room sits on a thick rubber mat make little noise. Good Luck.